# US 12,161,301 B2 · Blade insert illuminator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,161,301 B2 - Document ID: US12161301B2 - Status: Granted - Kind: B2 - Application number: 18/098,309 - Filed: 2023-01-18 - Published: 2023-07-13 - Granted: 2024-12-10 - Earliest claimed: 2007-10-24 - Assignees: Invuity, Inc. - Applicants: Invuity, Inc. - Inventors: Thomas L. Grey; Alex Vayser; Jonathan G. Gasson; Kenneth B. Trauner - Web page: https://patentgrep.com/patent/US12161301B2 ## CPC - A61B 1/07: using light-conductive means, e.g. optical fibres - A61B 1/0623: {for off-axis illumination} - A61B 17/02: for holding wounds open, e.g. retractors; Tractors - A61B 17/0218: {for minimally invasive surgery (A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence)} - A61B 90/30: Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure - A61B 90/80: Implements for cleaning or washing the skin of surgeons or patients - A61B 2090/306: {using optical fibres} - A61B 2090/309: {using white LEDs} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An air gap retractor illumination system includes any suitable retractor such as a McCulloch with a channel in the blade to accommodate an air gap illuminator. The illuminator is preferably made from a suitable light conducting plastic material such as acrylic or polycarbonate or silicone. The illuminator has active portions in which light passes and inactive or dead zones in which light does not pass as a result of the configuration and orientation of the input, output and surfaces of the illuminator. The illuminator is formed to have an air gap surrounding any active portion of the illuminator extending from the light input to the light output portion. The dead zones may include elements to allow the illuminator to securely engage the retractor. The light output portion of the illuminator contains from two to eight output zones, each zone having specially designed output optical structures that control and direct light to escape the illuminator to shine onto a predetermined area of interest or to form one or more predetermined shapes or footprints. ## Claims ### Claim 1 A method for illuminating a surgical field, comprising: coupling, using a retractor-engagement element, an optical waveguide to a surgical retractor, wherein the retractor-engagement element extends from the optical waveguide, wherein the retractor-engagement element comprises a plate that extends outwardly from the optical waveguide, wherein the optical waveguide comprises: a light input section configured to receive light from a light source, a light transmitting section distal of the light input section and configured to transmit the light distally from the light input section, and a light output section distal of the light transmitting section and configured to output the light from the optical waveguide; coupling, using a collar, the light input section of the optical waveguide to the light source, wherein the collar surrounds the light input section of the optical waveguide, wherein an annular air gap is defined between the collar and the light input section of the optical waveguide; and transmitting light from the light source to the light input section, from the light input section to the light transmitting section, from the light transmitting section to the light output section, and from the light output section to the surgical field. ### Claim 2 (depends on 1) The method of claim 1, wherein a longitudinal axis of the plate extends from the optical waveguide in a direction that is parallel to a direction in which the light output section extends from the light transmitting section. ### Claim 3 (depends on 1) The method of claim 1, wherein the plate is distal of the light input section. ### Claim 4 (depends on 1) The method of claim 1, wherein the light input section of the optical waveguide has a cylindrical shape, and wherein the light input section of the optical waveguide and the collar are configured such that the annular air gap surrounds the light input section of the optical waveguide. ### Claim 5 (depends on 1) The method of claim 1, wherein the collar extends proximally from the plate. ### Claim 6 (depends on 1) The method of claim 1, wherein the retractor-engagement element comprises a tab that is configured to couple to a recess on the surgical retractor. ### Claim 7 (depends on 1) The method of claim 1, wherein the light transmitting section is curved. ### Claim 8 (depends on 1) The method of claim 1, further comprising retracting tissue using the surgical retractor while transmitting the light from the light output section to the surgical field. ### Claim 9 A method for illuminating a surgical field, comprising: coupling, using a retractor-engagement element, an optical waveguide to a surgical retractor, wherein the retractor-engagement element extends from the optical waveguide, wherein the optical waveguide comprises: a light input section configured to receive light from an a light source, a light transmitting section distal of the light input section and configured to transmit the light distally from the light input section, and a light output section distal of the light transmitting section and configured to output the light from the optical waveguide, wherein the surgical retractor comprises a slot that receives the optical waveguide, wherein the slot defines a recess on a front side of the surgical retractor, wherein a back side of the surgical retractor is opposite the front side and configured to engage tissue, wherein an entirety of the light transmitting section and an entirety of the light output section of the optical waveguide are on the front side when the optical waveguide is coupled to the surgical retractor; and transmitting light from the light source to the light input section, from the light input section to the light transmitting section, from the light transmitting section to the light output section, and from the light output section to the surgical field. ### Claim 10 (depends on 9) The method of claim 9, wherein the optical waveguide is disposed in the slot of the surgical retractor such that an air gap is defined between a plurality of active zones of the optical waveguide and the surgical retractor, wherein the plurality of active zones transmit the light through the light transmitting section from the light input section to the light output section. ### Claim 11 (depends on 10) The method of claim 10, wherein the retractor-engagement element comprises a plate that extends outwardly from the optical waveguide. ### Claim 12 (depends on 11) The method of claim 11, wherein a longitudinal axis of the plate extends from the optical waveguide in a direction that is parallel to a direction in which the light output section extends from the light transmitting section. ### Claim 13 (depends on 11) The method of claim 11, wherein the plate is distal of the light input section. ### Claim 14 (depends on 9) The method of claim 9, wherein the retractor-engagement element comprises a tab that is coupled to a recess on the surgical retractor. ### Claim 15 (depends on 9) The method of claim 9, wherein the light transmitting section is curved, and wherein the slot is curved such that the light transmitting section is received in the slot. ### Claim 16 (depends on 9) The method of claim 9, further comprising retracting tissue using the back side of the surgical retractor while transmitting the light from the light output section to the surgical field. ### Claim 17 A method of making a system for illuminating a surgical field, comprising: forming an optical waveguide, wherein the optical waveguide comprises: a light input section configured to receive light from an illumination element, a light transmitting section distal of the light input section and configured to transmit the light distally from the light input section, and a light output section distal of the light transmitting section and configured to output the light from the optical waveguide; coupling a retractor-engagement element to the optical waveguide, wherein the retractor-engagement element comprises a plate that extends outwardly from the optical waveguide; and coupling a collar to the light input section of the optical waveguide such that the collar surrounds the light input section of the optical waveguide and defines an annular air gap between the collar and the optical waveguide, wherein the retractor-engagement element is configured to couple the optical waveguide to a surgical retractor. ### Claim 18 (depends on 17) The method of claim 17, wherein forming the optical waveguide comprises forming the light input section, the light transmitting section, and the light output section as a single, monolithic element of optical material. ### Claim 19 (depends on 17) The method of claim 17, wherein forming the optical waveguide comprises forming the light transmitting section with a curved shape. ### Claim 20 (depends on 17) The method of claim 17, wherein the collar extends proximally from the plate, and wherein the retractor-engagement element comprises a tab that is configured to couple to a recess on the surgical retractor.